ninja: Pass -rpath-link when passing -rpath.
ninja: Pass -rpath-link when passing -rpath.

Gold works fine without -rpath-link, but GNU ld needs it. The make generator already does this.
To quote the previous make generator CL:
"it appears that ld.bfd is not $ORIGIN-aware and needs additional information to figure out where to find shared libraries that shared libraries depend on"
Review URL: https://codereview.chromium.org/12335018
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google